meeriel e



d 1U NITE To a/ZZ wiz/cm t may concern,.- f i e e Be itknown that I, MERRILL F.W1Loox,

of Bay City, in the county of B ay and State of t j lvlichigandiaveinvented certainnewand useful .l Pump-Tubing and Pipes, of which the following.` is a full, clear, and exact description. This improvement relates to Wooden tubing specially pumptubing, in which `it is desirax ,faceto suehftubing than has `heretofore `been practicable by` siinplylboring itby means of an auger onothegrf` like tool. This smoothing e I accomplish,;not bycutting, butbypressure {and friction `Without removal of the ber, and

bored hole `inl `the, Wood a rapidly rotating smoothsteclor otherlsuitable plug of slightly l largerdian'ieter than the hole or bore. In the e @advance end of this plugI propose also to l form a cavity and charge-the same with rosin, gum, or other filling and glazing material, which will be ejected bya centrifugal action 4 from the rapidly rotating plug and caused to i fill bad or open places in the Wood, as Well as to glaze the inner walls of the tubing, and

.5. thereto. Such iilling and glazing, however,

may, if desired, be dispensed with.

t Reference is to be-had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate cor! sponding parts in all the figures'.

Figure l represents a longitudinal section of a piece of pump-tubing as in the course of having its bore smoothed in accordance with my invention, and with the smoothing-tool as having partially completed its work. Fig. 2 is a transverse section on the line m be in Fig.

` l, and Fig. 3 a transverse section on the line e y y in Fig. l.

A is the Wooden tubing, and b b its hole or borenvhichwmay be made by an auger, as

e usual. As the tubing, however, is left bythe auger, or before the smoothing-tool is passed i through it, its interiorwalls present a rough- 50 `ened surface, as shown at b in Figs. l and 2.

. i' STATES Improvements in the Manufacture of Yooden" t bytheauger. orpipes of different descriptions, but more ble to have thef-bore7` of the tubing as smooth 1` as possible; audit has for its object zthe pro- ,duction` ofa smoother and closer interior sur- .1

` for this` purpose force alongA or through the` t e e give a still smoother, and more perfect `finish,

. caused to lill load or open places iu the Wood, t

and as the body of the plug follows in the thereby give a smoother or .more perfect finish` `PATENT @Erica f i, MERRILL WLCOX, or Bar orrv, `metuent'. ,lsMooTi-"HNG THe INNER SURFACE; oF` WOODEN Tueme.

` `SP1-3CIlEiICATION formingpart ofLettersPai-.ent `1\l'o.`295,7`03, daal-.ed March 25e1 1884.

Applicationl filed September 10, i883. (No model.)

smooth finish tothe interior of the tubing, I take a smooth steel plug, B, or other suitable smooth plug, of"siXor eight inchesin length, l more or less, and slightly larger `in diameter say one sixteenth of "an inch, or there borefor augenhole inthe Wood, and rapidly rotate "theV same While passing it along or 6to through the tubing,` for `Whiclrpurpose the plugmay be screwed into or screwed,,tothe1` end of a shaftor spindle,` C, `to which rotary motion and longitudinal feed `may be given by" any suitable means.' This smooths by simple 65 friction and pressure, Withoutldetachment or` ..1 remval of the ber, the interior Walls of` then. f tubing, and gives a hard or close andtrue cy-,

lindricalnish, as atb inFigs. `land 3Q `,To

however, I` construct theadvance` endfofthe rosin, gum, o r other suitable filling and glaz ing material, c, in a pulverized condition.` This materialwill be ejected by centrifugal"` action duringthe rotation ofthe plug,.and

Wake of the cavity d, said material will `be forced into the interstices or open places :in the Wood, `and the same made to givexa fine-` glazed nish to the inner Walls of the tubing.

Having thus describedmy invention7 what I claim as new, and desire to secure by Letters Patent,:is- V l 1. A method of smoothing the inner surface of wooden tubes, which consists in forcing through said tubes a rapidly rotating smooth steel plug slightly larger than the bore ofthe tube, as described.

2. A method of iilling vcavities or open places on the inside of wooden tubes and glazing the inner surface thereof, which consists in centrifugally distributing rosin or like substance on the inner surface in advance of 95 aud from a rotary smoother, as described.

MERRILL F. WILOOX.

Vitnesses:

WM. H. DEMPsTER, C. M. PRnsoo'rT.

To remove the roughness and to give a about-than the hole inthe `tubing as left` e This plug-I run through the 

